temco-tool 39tdvp 用户手册

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NOTE: Before troubleshooting the gas  control system, be sure external shut off is in the “ON” position.

WARNING: Before doing any gas control service work, remove glass front!

 

NOVA MV Plus 

Minimum Voltage 

145mV 

Hold-in Current 

Less than 285mA

 

 

Coil Resistance 

2.25Ω ± 0.5Ω 

Drop-out Current 

Greater than 125mA

 

 

 

 

Coil Resistance 

0.108Ω ± 0.003Ω

  Pilot will not light. 

Air in gas lines. 

Bleed all air from gas lines.

   

Wrong inlet pressure. 

With the main burner functioning, adjust the inlet pressure   

   

 

regulator to supply gas to the appliance within the design    

   

 

parameters of the appliance manufacturer.  (Typically 7”NG,  

   

 

11”LPG).

   

Defective spark electrode. 

Replace piezo wire if insulation is cracked or the tip is cor   

   

 

roded.

   

 

Verify that the spark gap between the pilot and the electrode  

   

 

is correct.

   

Defective piezo wire. 

Replace piezo wire if insulation is damaged, or the wire is  bro 

   

 

ken or corroded.

   

Safety interlock function engaged.  Allow thermocouple to cool until the mv drops below the hold- 

   

 

in requirements of the safety magnet, (30 seconds or less).   

   

 

Re-light pilot.

  Pilot will not hold. 

Wrong inlet pressure.  

With the main burner functioning, adjust   the inlet pressure  

   

 

regulator to supply gas to the appliance  within design  

 

   

 

parameters of the appliance manufacturer. (Typically 7”NG,  

   

 

11”LPG)

   

Pilot adjustment screw not  

After the pilot has been lit for approximately three minutes,  

   

properly adjusted. 

and only the thermo-generator wire connected to the main  

   

 

operator head, measure the voltage across TPTH and TP.   

   

 

This open circuit voltage should be between 500mv and    

   

 

750mv. Tune the pilot adjustment screw until the mv reading  

   

 

falls within these parameters. (Counter-clockwise increases  

   

 

mv reading, clockwise decreases).

   

Thermocouple or  

Make certain that the thermocouple and thermo-generator are  

   

thermo-generator not properly  

fully inserted and tightened into their receptacles in the pilot  

   

inserted into the pilot housing. 

head. The thermocouple should be threaded into the valve  

   

 

hand-tight, plus 1/4 turn with a wrench.

   

Thermocouple or  

With the thermocouple and thermo-generator tips cool, clean  

   

thermo-generator has film  

the upper 3/8” with a very fine emery cloth. 

 

 

   

build-up on tip.

   

Electrical resistance too high. 

Using a very fine emery cloth, clean thermo-generator and  

   

 

thermocouple connections at valve. Tighten thermocouple into  

   

 

valve hand-tight, plus 1/4 turn with a wrench.

   

Defective thermocouple. 

Verify that thermocouple is not kinked or damaged. Check   

   

(mv Plus systems) 

open circuit voltage of thermocouple. Voltage should be    

   

 

between 18mv and 28mv. If voltage is less than 14mv,  

 

   

 

replace thermocouple.